CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

sas on 2003 2500hd

Finally had time to do the trans install. The exhaust had to come down and the cross member came down super nice and easy...just real heavy. The whole thing went pretty easy with a harbor freight tranny jack. Everything worked out well, fluids full in both trans and t-case and went for a drive. The trans shifts perfect but the speedo didn't work, So the sensor from the old t-case was swapped in and it worked flawless. Going to drive it around today and see what needs to be adjusted.
 
I have about 50 miles on it now, still breaking in the converter and that will take a bit. I need to do 50 rolling lockups. It was 85 degrees yesterday and the trans temp was at 110, that's pretty good and way better than the last trans. From the driving i did do you can tell the converter's going to make a huge differance. The fluids stayed right on the full hot mark too so that's a plus. I sent blackbear an email about the trans adjustments so i can get it closer, for now anyway until my hp tuners suite pro comes in. The pro has a 5v referance so i can connect my wideband, much easier tuning this way. A few guys on performance trucks are really good at it and are going to lend a hand to get me going and go over the tunes.
 
Nice shaft...

I've really been wanting to buy HP Tuners or EFI Live and start doing some tweaking of my own. For right now it's hard for me to justify the price until I start doing some more mods.
 
With the mods I have and more being done slowly I need hp tuners. I have efi live now, nobody has it that can help me with it. I have the blackbear auto cal that I might sell. The auto cal u drive around and log it then send it thru email. Then they send updates, you put em in and ho from there back n forth. For what I have I need more hands on.
 
That 5 inch shaft was well worth every penny, no vibes and its pretty tough
I'm thinking of a few small mods that should bring some more power. My 1st thought is buying a nick williams boosted 102mm throttle body and 90-102 adapter. That's guaranteed 25-30 hp. After that i'll need to do a 5 inch intake. Then have a buddy of mine who did the 4 link machine the blower snout to fit a 2.5 pulley or just run the smallest 2.6. That should get me to push the stock bottom end with 15 psi. With 15psi, methanol I should be about 550hp or so.
 
I bought hp tuners from summit racing, setup took a little bit but i have it working. Plenty of help from guys over at pt trucks but overall its working well. A few changes to the fuel tables and its helped a ton. For the methanol now i'm mixing distilled water with it, its now 70% vp m1 and 30% water. Really the afr hasn't changed, i thought it would be far off. The iat sensor is bad in the blower, last weekend it was pulled off and a new sensor popped in, that's all fixed up. Watching my iat temps now tho is a shocker, they rise pretty fast, so i will be adding a bigger reservoir and another heat exchanger. Running them in a series seems to help alot. Also swapping out the stock 194 thermostat for a 180, the 194 in the ls motors comes to 200ish and at most 216. Meaning i should be able to keep it under 200 all the time now. Lingenfelter seems about the only 180, a 160 would be a little cool for winter conditions and heat.

From frozen boost i bought a heat exchanger the same size as the one on it now, 12 feet of 3/4 heater hose and clamps. For the new reservoir i'll be putting it in on the right rear corner of the engine compartment. Not sure at the moment what one, a buddy of mine used a powerstroke coolant tank and made fancy mounts. I'm working on getting a set of those mounts. If not i will buy one from trick turbo that holds 2 gallon.
 
A good tune makes all the difference

Yes, it helps a ton. A little on that..The adjustments so far with everything changed the whole thing. The trans adjustments were done to set shifting speeds and converter lockup. The fuel and spark tables adjusted helped the afr all the way thru the rpms. It seems to have more power too now with the correct amount of fuel. I see low 11s on the wideband with methanol at wide open throttle. I see a full 12 psi and a constant 65 psi of fuel pressure. My base fuel pressure is set at 52 so the pressure with the walbro 450 is about perfect. Still fine tuning, going to get it as close as i can and then switch over to speed density. Going to get rid of the maf and the 02 sensors.
 
Scratch that last post.............

Already coming into a few hurdles with tuning, if i stomp it to take off right at 4200 i start over powering the stock maf. So the afr goes all out of wack, fudging the tables and turning the meth up helps it to a point. So i will be trying a lingenfelter 100 mm mass airflow sensor. This maf is 4 inches and card style so it will even out the airflow instead of stuffing it thru the 78mm(about 3 inch) stock maf.. In theory it should get me to where i need to be and probably add 1/2 lb of boost. If that works out i'll go down a pulley size to the smallest i can go for another 1/2lb. Getting the grand total to 14 and tuned thru the maf which will make drive ability pretty nice
 
Not the reason to do it but yea a little more, hopefully with this maf no numbers need to be cheated. I've seen a little hp rise also in a few different setups. Minimum I should see is 5hp, the most was 20.
 
The lingenfelter maf came in, compared to stock it a massive difference. From reading it should do the trick with the extra inch of air flow. I ordered a few extra parts from summit to complete the straight thru air intake with a 6 inch round cone filter, as soon as those parts come in we will see how well it tunes. Hopefully the maf table has some room after this for a little extra, if not the 2.7 is as low as i can go with maf tuning. I'll post pics up in a day or so when i do the little swap.
 
Lingenfelter maf so far works excellent, a little fueling added and it's getting closer. Seems to run better too, the throttle is really snappy and smooth. Well worth the money, the maf #s with the stock maf were 12800, with the new one not even 11,000. Which is perfect, should be able to step down to a 2.6 pulley and at that point the blowers about maxed out.

View attachment 1494878029618_9318952065_62f78661_v1.jpg
 
A little more too add. The maf's working out well, The frequency is that much lower that i needed to adjust the alky control box down alot to get it to turn on at 5psi. With that now and all the adjustments made i see a little over 13psi and have plenty of maf left to go. I might be able to squeek more out of it. A local shop is building me a custom heat exchanger, the one now is 23x6.5 and 1.25 thick. The new one is 28x11 and 2.25 thick. That should help a ton with cooling and flow. Also picked up a 1.2 gallon reservoir for the heat exchanger, Together it will add over 2 gallon to the system, The catch tho will be is the coolant flow too slow or will i need a bigger pump.
 
Any updates? I'm really considering putting the lsa blower I have on my lq4, lots of great information in here!
 
I'll tell ya, its a money racket..lol. But it sure is fun to drive.

Nothing really to add i guess, i've had fuel system problems for a while and the tunes were always adjusted around them. Always more rich and fuel had to be pulled. This is ever since i went to a walbro 450 and an aeromotive boost reference regulator. The pressure never really rises like it should, with a base of 58 i should see 68 at 10 psi, i'm lucky to see over 60. So i adjusted my base to 52 and the most i would see is 58 and its been falling. I ended up buying a fuel lab 25-90 regulator and a new filter element, well setting the base at 54 now the whole thing is now lean...hmm. Lean because the tunes had fuel pulled because of the rich condition. So with the tune adjusted and my base at 54 it fired right up and idles perfect, cruise came into the low 15s and under boost in the low 11s.....awesome..lol. At 10 psi i did see over 60 and at 12 63-64ish. The regulator must have had a problem since new, that's all i can think of.

The new intercooler isn't done yet and the tank hasn't shipped so no updates on the supercharger air cooling at this time anyway...
 
That's good to know, I was actually looking at that exact same regulator. The constant tinkering involved with boost is the only thing that makes me hesitant.
 
Not really constant tinkering, figure out what u want up front and do it all at one time. I went abut it wrong I guess, doing the blower and then the cam then from low boost to alot more. Should of done the cam and the fuel system upgrades, then the blower bolt on would of been alot easier.
 
Few small updates, my intercooler is done and I'll pick it up monday. I should see the tank and fittings by the end of the week. Hopefully with the's two mods my temps are lowered and recover faster. Going to move my longs tru cool tran cooler back up behind the intercooler also.

The exhaust with dual magnaflow 3 inch mufflers is still to raspy and sounds horrible over 3k. The packing coming out too, kinda funny coming out the tail pipes. So I ended up buying a flo pro big oval muffler.http://www.flopro.com/bigoval.html It's a stock style but dual 3 inch in and out. Will equal the exhaust and quit it down, hopefully I don't loose too much since I'd imagine it will add not needed back pressure. They flow good but not like a straight thru muffler. Hope to get it on today and see how it sounds, be nice to hear the supercharger again...lol

Edit: New muffler is on, Fit rather well, needs a little work tho. From right at the bumper the tips are even, when u step back and look one pipe is lower than the other back about a foot. Ill take it and have new tails or one tail made up if i like the muffler. It's super quiet, a little louder than stock, idle is you can still hear the cam but wide open is just air..lol. So if it gets a little louder it will be perfect. Driving it every day and towing the trailer its nice to not have drone.
 
Last edited:
Top Bottom